AD导入Allegro brd文件(导入后找不到PCB的解决方法)

怼烎@ 2023-06-29 06:56 23阅读 0赞

Allegro原点位置设置

AD导入allegro　brd失败（导入后找不到PCB，需要切换到3D模式挪动）：

1.  Edit -> Select –>outside (先切换到3D视图找到板卡位置后再回到2D，然后选择outside之后在视图左上角空白附近画一个小框即可)：

进入3D:![20200111065805855.png][]

(在3D模式可能需要稍微拖动或缩放，回到2D后才能看到一个整体视图，否则将是空白)

回到2D后:![20200111065758405.png][]

1.  Move -> Selection(然后将选中的部分向原点方向（“J”->Current Origin）挪动,)；1和2步骤可能要重复多次，才能移动到自己想要的位置
2.  切换到keepout层自己定义一个新的外框

最终得到了一个半成品：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70][]

注意：

AD操作期间可以先关闭在线DRC:

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 1][]

Allegro: setup->drawing sizes:

可以看见origin 虽然在(0,0)，但是“DRAWING EXTENTS”数值却很大，难怪导入后无法找到，我们将它改小。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 2][]

Left X和Lower Y的意思是：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 3][]

可以看到导入出问题的板卡所在整个工作屏幕的位置(它远离了左下角，但左下角导入AD后会变为原点，超出了AD PCB sheet的最大尺寸)：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 4][]

虽然找到了问题原因，但是allegro 修改 drawing size 比较麻烦：

需要一步一步的减小当前值（一点一点减小，4个参数还要同时修改，不停尝试，***最好***减小到一定值时，同时将Size改为D）：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 5][]

最终导入成功（总算解决了困扰我很久的问题）：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 6][]

[20200111065805855.png]: https://img-blog.csdnimg.cn/20200111065805855.png
[20200111065758405.png]: https://img-blog.csdnimg.cn/20200111065758405.png
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